contrib/gcc-3.4/libstdc++-v3/src/locale.cc

   1 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
   2 // Free Software Foundation, Inc.
   3 //
   4 // This file is part of the GNU ISO C++ Library.  This library is free
   5 // software; you can redistribute it and/or modify it under the
   6 // terms of the GNU General Public License as published by the
   7 // Free Software Foundation; either version 2, or (at your option)
   8 // any later version.
   9
  10 // This library is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License along
  16 // with this library; see the file COPYING.  If not, write to the Free
  17 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  18 // USA.
  19
  20 // As a special exception, you may use this file as part of a free software
  21 // library without restriction.  Specifically, if other files instantiate
  22 // templates or use macros or inline functions from this file, or you compile
  23 // this file and link it with other files to produce an executable, this
  24 // file does not by itself cause the resulting executable to be covered by
  25 // the GNU General Public License.  This exception does not however
  26 // invalidate any other reasons why the executable file might be covered by
  27 // the GNU General Public License.
  28
  29 #include <clocale>
  30 #include <cstring>
  31 #include <cstdlib>     // For getenv
  32 #include <cctype>
  33 #include <cwctype>     // For towupper, etc.
  34 #include <locale>
  35 #include <bits/atomicity.h>
  36
  37 namespace std
  38 {
  39   // Definitions for static const data members of locale.
  40   const locale::category        locale::none;
  41   const locale::category        locale::ctype;
  42   const locale::category        locale::numeric;
  43   const locale::category        locale::collate;
  44   const locale::category        locale::time;
  45   const locale::category        locale::monetary;
  46   const locale::category        locale::messages;
  47   const locale::category        locale::all;
  48
  49   // These are no longer exported.
  50   locale::_Impl*                locale::_S_classic;
  51   locale::_Impl*                locale::_S_global;
  52   const size_t                  locale::_S_categories_size;
  53
  54 #ifdef __GTHREADS
  55   __gthread_once_t              locale::_S_once = __GTHREAD_ONCE_INIT;
  56 #endif
  57
  58   locale::locale(const locale& __other) throw()
  59   : _M_impl(__other._M_impl)
  60   { _M_impl->_M_add_reference(); }
  61
  62   // This is used to initialize global and classic locales, and
  63   // assumes that the _Impl objects are constructed correctly.
  64   // The lack of a reference increment is intentional.
  65   locale::locale(_Impl* __ip) throw() : _M_impl(__ip)
  66   { }
  67
  68   locale::~locale() throw()
  69   { _M_impl->_M_remove_reference(); }
  70
  71   bool
  72   locale::operator==(const locale& __rhs) const throw()
  73   {
  74     bool __ret = false;
  75     if (_M_impl == __rhs._M_impl)
  76       __ret = true;
  77     else
  78       {
  79         const string __name = this->name();
  80         if (__name != "*" && __name == __rhs.name())
  81           __ret = true;
  82       }
  83     return __ret;
  84   }
  85
  86   const locale&
  87   locale::operator=(const locale& __other) throw()
  88   {
  89     __other._M_impl->_M_add_reference();
  90     _M_impl->_M_remove_reference();
  91     _M_impl = __other._M_impl;
  92     return *this;
  93   }
  94
  95   string
  96   locale::name() const
  97   {
  98     string __ret;
  99     if (_M_impl->_M_check_same_name())
 100       __ret = _M_impl->_M_names[0];
 101     else
 102       {
 103         __ret += _S_categories[0];
 104         __ret += '=';
 105         __ret += _M_impl->_M_names[0];
 106         for (size_t __i = 1; __i < _S_categories_size; ++__i)
 107           {
 108             __ret += ';';
 109             __ret += _S_categories[__i];
 110             __ret += '=';
 111             __ret += _M_impl->_M_names[__i];
 112           }
 113       }
 114     return __ret;
 115   }
 116
 117   locale::category
 118   locale::_S_normalize_category(category __cat)
 119   {
 120     int __ret = 0;
 121     if (__cat == none || (__cat & all) && !(__cat & ~all))
 122       __ret = __cat;
 123     else
 124       {
 125         // NB: May be a C-style "LC_ALL" category; convert.
 126         switch (__cat)
 127           {
 128           case LC_COLLATE:
 129             __ret = collate;
 130             break;
 131           case LC_CTYPE:
 132             __ret = ctype;
 133             break;
 134           case LC_MONETARY:
 135             __ret = monetary;
 136             break;
 137           case LC_NUMERIC:
 138             __ret = numeric;
 139             break;
 140           case LC_TIME:
 141             __ret = time;
 142             break;
 143 #ifdef _GLIBCXX_HAVE_LC_MESSAGES
 144           case LC_MESSAGES:
 145             __ret = messages;
 146             break;
 147 #endif
 148           case LC_ALL:
 149             __ret = all;
 150             break;
 151           default:
 152             __throw_runtime_error(__N("locale::_S_normalize_category "
 153                                   "category not found"));
 154           }
 155       }
 156     return __ret;
 157   }
 158
 159   // locale::facet
 160   __c_locale locale::facet::_S_c_locale;
 161
 162   const char locale::facet::_S_c_name[2] = "C";
 163
 164 #ifdef __GTHREADS
 165   __gthread_once_t locale::facet::_S_once = __GTHREAD_ONCE_INIT;
 166 #endif
 167
 168   void
 169   locale::facet::_S_initialize_once()
 170   {
 171     // Initialize the underlying locale model.
 172     _S_create_c_locale(_S_c_locale, _S_c_name);
 173   }
 174
 175   __c_locale
 176   locale::facet::_S_get_c_locale()
 177   {
 178 #ifdef __GHTREADS
 179     if (__gthread_active_p())
 180       __gthread_once(&_S_once, _S_initialize_once);
 181     else
 182 #endif
 183       {
 184         if (!_S_c_locale)
 185           _S_initialize_once();
 186       }
 187     return _S_c_locale;
 188   }
 189
 190   const char*
 191   locale::facet::_S_get_c_name()
 192   { return _S_c_name; }
 193
 194   locale::facet::
 195   ~facet() { }
 196
 197   // locale::_Impl
 198   locale::_Impl::
 199   ~_Impl() throw()
 200   {
 201     if (_M_facets)
 202       for (size_t __i = 0; __i < _M_facets_size; ++__i)
 203         if (_M_facets[__i])
 204           _M_facets[__i]->_M_remove_reference();
 205     delete [] _M_facets;
 206
 207     if (_M_caches)
 208       for (size_t __i = 0; __i < _M_facets_size; ++__i)
 209         if (_M_caches[__i])
 210           _M_caches[__i]->_M_remove_reference();
 211     delete [] _M_caches;
 212
 213     if (_M_names)
 214       for (size_t __i = 0; __i < _S_categories_size; ++__i)
 215         delete [] _M_names[__i];
 216     delete [] _M_names;
 217   }
 218
 219   // Clone existing _Impl object.
 220   locale::_Impl::
 221   _Impl(const _Impl& __imp, size_t __refs)
 222   : _M_refcount(__refs), _M_facets(0), _M_facets_size(__imp._M_facets_size),
 223   _M_caches(0), _M_names(0)
 224   {
 225     try
 226       {
 227         _M_facets = new const facet*[_M_facets_size];
 228         for (size_t __i = 0; __i < _M_facets_size; ++__i)
 229           {
 230             _M_facets[__i] = __imp._M_facets[__i];
 231             if (_M_facets[__i])
 232               _M_facets[__i]->_M_add_reference();
 233           }
 234         _M_caches = new const facet*[_M_facets_size];
 235         for (size_t __j = 0; __j < _M_facets_size; ++__j)
 236           {
 237             _M_caches[__j] = __imp._M_caches[__j];
 238             if (_M_caches[__j])
 239               _M_caches[__j]->_M_add_reference();
 240           }
 241         _M_names = new char*[_S_categories_size];
 242         for (size_t __k = 0; __k < _S_categories_size; ++__k)
 243           _M_names[__k] = 0;
 244
 245         // Name all the categories.
 246         for (size_t __l = 0; __l < _S_categories_size; ++__l)
 247           {
 248             char* __new = new char[std::strlen(__imp._M_names[__l]) + 1];
 249             std::strcpy(__new, __imp._M_names[__l]);
 250             _M_names[__l] = __new;
 251           }
 252       }
 253     catch(...)
 254       {
 255         this->~_Impl();
 256         __throw_exception_again;
 257       }
 258   }
 259
 260   void
 261   locale::_Impl::
 262   _M_replace_category(const _Impl* __imp,
 263                       const locale::id* const* __idpp)
 264   {
 265     for (; *__idpp; ++__idpp)
 266       _M_replace_facet(__imp, *__idpp);
 267   }
 268
 269   void
 270   locale::_Impl::
 271   _M_replace_facet(const _Impl* __imp, const locale::id* __idp)
 272   {
 273     size_t __index = __idp->_M_id();
 274     if ((__index > (__imp->_M_facets_size - 1))
 275         || !__imp->_M_facets[__index])
 276       __throw_runtime_error(__N("locale::_Impl::_M_replace_facet"));
 277     _M_install_facet(__idp, __imp->_M_facets[__index]);
 278   }
 279
 280   void
 281   locale::_Impl::
 282   _M_install_facet(const locale::id* __idp, const facet* __fp)
 283   {
 284     if (__fp)
 285       {
 286         size_t __index = __idp->_M_id();
 287
 288         // Check size of facet vector to ensure adequate room.
 289         if (__index > _M_facets_size - 1)
 290           {
 291             const size_t __new_size = __index + 4;
 292
 293             // New facet array.
 294             const facet** __oldf = _M_facets;
 295             const facet** __newf;
 296             __newf = new const facet*[__new_size];
 297             for (size_t __i = 0; __i < _M_facets_size; ++__i)
 298               __newf[__i] = _M_facets[__i];
 299             for (size_t __l = _M_facets_size; __l < __new_size; ++__l)
 300               __newf[__l] = 0;
 301
 302             // New cache array.
 303             const facet** __oldc = _M_caches;
 304             const facet** __newc;
 305             try
 306               {
 307                 __newc = new const facet*[__new_size];
 308               }
 309             catch(...)
 310               {
 311                 delete [] __newf;
 312                 __throw_exception_again;
 313               }
 314             for (size_t __j = 0; __j < _M_facets_size; ++__j)
 315               __newc[__j] = _M_caches[__j];
 316             for (size_t __k = _M_facets_size; __k < __new_size; ++__k)
 317               __newc[__k] = 0;
 318
 319             _M_facets_size = __new_size;
 320             _M_facets = __newf;
 321             _M_caches = __newc;
 322             delete [] __oldf;
 323             delete [] __oldc;
 324           }
 325
 326         __fp->_M_add_reference();
 327         const facet*& __fpr = _M_facets[__index];
 328         if (__fpr)
 329           {
 330             // Replacing an existing facet. Order matters.
 331             __fpr->_M_remove_reference();
 332             __fpr = __fp;
 333           }
 334         else
 335           {
 336             // Installing a newly created facet into an empty
 337             // _M_facets container, say a newly-constructed,
 338             // swanky-fresh _Impl.
 339             _M_facets[__index] = __fp;
 340           }
 341
 342         // Ideally, it would be nice to only remove the caches that
 343         // are now incorrect. However, some of the caches depend on
 344         // multiple facets, and we only know about one facet
 345         // here. It's no great loss: the first use of the new facet
 346         // will create a new, correctly cached facet anyway.
 347         for (size_t __i = 0; __i < _M_facets_size; ++__i)
 348           {
 349             const facet* __cpr = _M_caches[__i];
 350             if (__cpr)
 351               {
 352                 __cpr->_M_remove_reference();
 353                 _M_caches[__i] = 0;
 354               }
 355           }
 356       }
 357   }
 358
 359
 360   // locale::id
 361   // Definitions for static const data members of locale::id
 362   _Atomic_word locale::id::_S_refcount;  // init'd to 0 by linker
 363
 364   size_t
 365   locale::id::_M_id() const
 366   {
 367     if (!_M_index)
 368       _M_index = 1 + __gnu_cxx::__exchange_and_add(&_S_refcount, 1);
 369     return _M_index - 1;
 370   }
 371 } // namespace std
 372
 373